The Nicene-Constantinopolitan Creed is that creed formulated at the First and Second Ecumenical Councils. It was defined by the Holy Fathers of those first two councils (held in Nicea 325AD and Constantinople 381AD, respectively) to combat various heresies notably Arianism, Apollinarianism.
English
I believe in one God, Father Almighty, Creator of heaven and earth, and of all things visible and invisible.
And in one Lord Jesus Christ, the only-begotten Son of God, begotten of the Father before all ages; Light of Light, true God of true God, begotten, not created, of one essence with the Father through Whom all things were made. Who for us men and for our salvation came down from heaven and was incarnate of the Holy Spirit and the Virgin Mary and became man. He was crucified for us under Pontius Pilate, and suffered and was buried; And He rose on the third day, according to the Scriptures. He ascended into heaven and is seated at the right hand of the Father; And He will come again with glory to judge the living and the dead. His kingdom shall have no end.
And in the Holy Spirit, the Lord, the Creator of life, Who proceeds from the Father, Who together with the Father and the Son is worshipped and glorified, Who spoke through the prophets.
In one, holy, catholic, and apostolic Church.
I confess one baptism for the forgiveness of sins.
I look for the resurrection of the dead, and the life of the age to come.
Amen.
GREEK
Πιστεύομεν εἰς ἕνα Θεὸν Πατέρα παντοκράτορα
ποιητὴν οὐρανοῦ καὶ γῆς ὁρατῶν τε πάντων καὶ ἀοράτων·
καὶ εἰς ἕνα Κύριον Ἰησοῦν Χριστὸν
τὸν υἱὸν τοῦ Θεοῦ τὸν Μονογενῆ,
τὸν ἐκ τοῦ Πατρὸς γεννηθέντα πρὸ πάντων τῶν αἰώνων,
Φῶς ἐκ Φωτός,
Θεὸν ἀληθινὸν ἐκ Θεοῦ ἀληθινοῦ,
γεννηθέντα οὐ ποιηθέντα,
ὁμοούσιον τῷ Πατρί,
δι’ οὗ τὰ πάντα ἐγένετο·
τὸν δι’ ἡμᾶς τοὺς ἀνθρώπους καὶ διὰ τὴν ἡμετέραν σωτηρίαν κατελθόντα ἐκ τῶν οὐρανῶν,
καὶ σαρκωθέντα ἐκ Πνεύματος Ἁγίου καὶ Μαρίας τῆς παρθένου,
καὶ ἐνανθρωπήσαντα,
σταυρωθέντα τε ὑπὲρ ἡμῶν ἐπὶ Ποντίου Πιλάτου,
καὶ παθόντα, καὶ ταφέντα,
καὶ ἀναστάντα τῇ τρίτῃ ἡμέρᾳ κατὰ τὰς γραφὰς,
καὶ ἀνελθόντα εἰς τοὺς οὐρανοὺς,
καὶ καθεζόμενον ἐν δεξιᾷ τοῦ Πατρὸς,
καὶ πάλιν ἐρχόμενον μετὰ δόξης κρῖναι ζῶντας καὶ νεκρούς,
οὗ τῆς βασιλείας οὐκ ἔσται τέλος·
καὶ εἰς τὸ Πνεῦμα τὸ Ἅγιον, τὸ Κύριον καὶ Ζωοποιόν,
τὸ ἐκ τοῦ Πατρὸς ἐκπορευόμενον,
τὸ σὺν Πατρὶ καὶ Υἱῷ συμπροσκυνούμενον καὶ συνδοξαζόμενον,
τὸ λαλῆσαν διὰ τῶν προφητῶν·
εἰς μίαν ἁγίαν καθολικὴν καὶ ἀποστολικὴν ἐκκλησίαν·
ὁμολογοῦμεν ἓν βάπτισμα εἰς ἄφεσιν ἁμαρτιῶν·
προσδοκῶμεν ἀνάστασιν νεκρῶν,
καὶ ζωὴν τοῦ μέλλοντος αἰῶνος. ἀμήν.